・Maintenance File Cleaner
CCleaner
https://www.ccleaner.com/ccleaner/builds
CCEnhancer
https://singularlabs.com/software/ccenhancer/
BleachBit
https://www.bleachbit.org/

・Registry Cleaner
Wise Registry Cleaner Pro
https://www.wisecleaner.com/wise-registry-cleaner.html
Eusing Free Registry Cleaner
https://www.eusing.com/free_registry_cleaner/registry_cleaner.htm
Free Window Registry Repair
https://www.regsofts.com/free_registry_repair/registry_repair.htm

・Registry-Editor
Registry Finder
https://registry-finder.com/

・Uninstaller
Bulk Crap Uninstaller
https://github.com/Klocman/Bulk-Crap-Uninstaller/releases
Revo Uninstaller Pro
https://www.revouninstaller.com/
O&O AppBuster
https://www.oo-software.com/de/ooappbuster
cli-lab（.NET uninstall tool）
https://github.com/dotnet/cli-lab/releases

・Maintenance Software
Glary Utilities Pro
https://www.glarysoft.com/
Optimizer
https://github.com/hellzerg/optimizer
O&O Defrag Professional Edition
https://www.oo-software.com/en/products/oodefrag

・Driver Updater
Driver Booster Pro
https://jp.iobit.com/driver-update-software/driverbooster-free.html

・System-Wide Backup Software
Macrium Reflect Workstation/Server/Server Plus
https://www.macrium.com/

・File & Folder Synchronization Software
FreeFileSync
https://freefilesync.org/